simpar v0.1.0 Release Notes

This marks the first offical pre-release of simpar. There are a handful of
changes from v0.0.1. The plotting module has been removed as it was deemed
out-of-scope for this project. Additionally, the metrics module was removed and
its functions were moved to be methods of the Trajectory class. Initial hidden
and discovered can now be passed to the sim.Sim class. The groups module was
updated to utilize this with the get_init_SIR_and_DH method for the MetaGroup
and Population class. The Scenario now includes pct_recovered_discovered
indicating the fraction of the recovered population that has been discovered.
This replaced the previous and less interpretable parameter,
pct_recovered_discovered_arrival. The remaining minor changes and bug fixes are
summarized below. Lastly, the documentation was greatly improved.

Minor changes:
- IsolationRegime class added and isolation params removed from Scenario
- Made S, I, R, D, and H properties of sim.Sim and use np.copy()
- Added true_sensitivity attribute to Test class
- More sensible implementation of get infections/recovered in TestRegime

Bug fixes:
- get_isolated was viewing D compartment as non-cumulative
- indexing error with generations in Sim
- Scenario.simulate_sim was not stepping the first time period